mc9s08qg8 Freescale Semiconductor, Inc, mc9s08qg8 Datasheet - Page 39

• Manufacturer Part Number: mc9s08qg8
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

0x0000
0x0001
0x0002
0x0003
0x0004–
0x000B
0x000C
0x000D
0x000E
0x000F
0x0010
0x0011
0x0012
0x0013
0x0014
4.3
The registers in the MC9S08QG8/4 are divided into these groups:
Direct-page registers can be accessed with efficient direct addressing mode instructions. Bit manipulation
instructions can be used to access any bit in any direct-page register.
user-accessible direct-page registers and control bits.
The direct page registers in
the lower byte of the address. Because of this, the lower byte of the address in column one is shown in bold
text. In
and
the right. Cells that are not associated with named bits are shaded. A shaded cell with a 0 indicates this
unused bit always reads as a 0. Shaded cells with dashes indicate unused or reserved bit locations that could
read as 1s or 0s.
Freescale Semiconductor
Address
•
•
•
Table
Because the nonvolatile register locations are FLASH memory, they must be erased and
programmed like other FLASH memory locations.
Table 4-3
Direct-page registers are located in the first 96 locations in the memory map; these are accessible
with efficient direct addressing mode instructions.
High-page registers are used much less often, so they are located above 0x1800 in the memory
map. This leaves more room in the direct page for more frequently used registers and RAM.
The nonvolatile register area consists of a block of 16 locations in FLASH memory at
0xFFB0–0xFFBF. Nonvolatile register locations include:
— NVPROT and NVOPT are loaded into working registers at reset.
— An 8-byte backdoor comparison key that optionally allows a user to gain controlled access to
PTAD
PTADD
PTBD
PTBDD
Reserved
KBISC
KBIPE
KBIES
IRQSC
ADCSC1
ADCSC2
ADCRH
ADCRL
ADCCVH
Register Addresses and Bit Assignments
Register Name
4-4, the register names in column two are shown in bold to set them apart from the bit names to
secure memory.
and
Table
KBEDG7
PTBDD7
KBIPE7
ADACT
PTBD7
COCO
ADR7
Table 4-2
4-4, the whole address in column one is shown in bold. In
Bit 7
—
—
0
0
0
0
0
0
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 1.01
Table 4-2. Direct-Page Register Summary
KBEDG6
PTBDD6
IRQPDD
KBIPE6
ADTRG
PTBD6
ADR6
can use the more efficient direct addressing mode that requires only
AIEN
—
—
6
0
0
0
0
0
KBEDG5
PTADD5
PTBDD5
KBIPE5
PTAD5
PTBD5
ADCO
ACFE
ADR5
—
—
5
0
0
0
0
PTADD4
PTBDD4
KBEDG4
KBIPE4
ACFGT
PTAD4
PTBD4
IRQPE
ADR4
—
—
4
0
0
0
KBEDG3
PTADD3
PTBDD3
KBIPE3
PTAD3
PTBD3
ADR3
IRQF
Chapter 4 Memory Map and Register Definition
KBF
Table 4-2
—
—
—
3
0
0
PTADD2
PTBDD2
KBEDG2
IRQACK
KBIPE2
KBACK
PTAD2
PTBD2
ADCH
ADR2
is a summary of all
—
—
—
2
0
0
Table
KBEDG1
PTADD1
PTBDD1
KBIPE1
ADCV9
PTAD1
PTBD1
IRQIE
ADR9
ADR1
KBIE
—
—
—
1
4-2,
Table
KBEDG0
IRQMOD
PTADD0
PTBDD0
KBIMOD
KBIPE0
ADCV8
PTAD0
PTBD0
ADR8
ADR0
Bit 0
—
—
—
4-3,
39